Power-transmitting mechanism.



PATENTED" JUNE 16, 1903.

1. LBHMAN. POWER TRANSMITTING MECHANISM.

- AP PLIOATIOK FILED MAR. 16, 1903.

H0 MODEL.

INVEgJZOHI: BY

- ATTOHNEYJ- UNITED STATES Patented June 16, 1903.

PATENT OFFICE.

ISADOR LEI-IMAN, OF CLEVELAND, OHIO.

POWER-TRANSMITTING MECHANISM.

SPECIFICATION formingpart of Letters Patent No. 730,936; dated June 16, 1903.

7 Application filed March 16, 1903. Serial No. 148,031. (No modelJ To all whom it may concern:

Be it known that LISADOR LEHMAN, a citi: zen of the United Statesof America, residing at Cleveland,-in the county of Ouyahoga and State of Ohio, haveinvented certain new and useful Improvements in Power-Transmitting Mechanisms; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to improvements in power-transmitting mechanism suitable for use in transmitting-power from a reciprocat ing member to any movable member or object, and pertains more especially to such an operative connection between the said reciprocating member and the crank of a crank-- shaft that the length of the reciprocations of the said reciprocating member and the connected pitman are materially shorter than would be the case if the said pitman were directly connected with thesaid crank.

l/Vith this object in view, and more especially to advantageouslyarrange the different parts of the mechanism, this invention consists in the certain peculiarities of construction and arrangement and combination of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure l is a side elevation, largely in central longitudin'al section, of my improved power-transmitting mechanism arranged to transmit power from the piston of the cylinder of an engine to the crank of the engine-shaft. top plan of the same.

Referring to the drawings, adesignates the cylinder of an engine; I), the piston, contained within and adapted to operate endwise of the interior chamber of the cylinder; 0, a cross-head or slide with which the outer end of the piston-rod d is provided externally of the cylinder, and G slideways or guides engaged by the said slide or reciprocating member. A pitman f is pivoted horizontally and transversely at one end, as at h, to the reciprocating member 0 and pivoted horizontally and transversely at its other end, as at 7c, to the upper of two approximately parallel rods Z and 0, arranged one above the other.

A depending rock-arm p is arranged with Fig. 2 is at its axis between the path of the reciprocating member 0 and the engine-shaft 1", which is a crank-shaft whose crank 15 is operative] y attached to an oscillating lever m, which centrally between its ends loosely embraces the wrist t of the said crank. The shaft '2" and the path of the reciprocating member 0 are arranged at right angles to each other, and the saidshaft and the said path and the axis of the rock arm p are preferablyarranged at the same elevation. It will be observed that the lever m extends below, as well as above, the wrist t. The upper rod Z is pivoted horizontally and transversely, as at n, to the upper end of the'lever m, which is fulcrumed,

' as at u, at its lower end and below the wrist t, horizontally to and transversely of the lower rod 0. Preferably the arrangement of the parts is such that the lower extremity of the lever mis as far below the wrist t as the upper extremity of the lever is above the said wrist. Hence the rods Z and 0 are arranged equidistant from the wrist t at opposite sides, respectively, of the said wrist, and consequently the load upon the crank of the crankshaft or object to be driven is advantageously distributed.

The lower rod 0 is pivoted horizontally and transversely, as at w, to the lower end of the rock-arm p. 7 The upper rod lis pivoted horizontally-and transversely, as at 00, to the arm p between therod o and the axis of the said arm. a r

The rock-arm p is provided at its upper-end with trunnio'ns 1 which are arranged parallel with the cran k-shaft and have bearings in boxes e, with which any suitable supportsuch, for instance, as the stationary framework of the engineis provided. The upper portion of the rock-arm pis recessed or cut away, as at j, to-accommodate the location and operation of the..pitman f, and the upper rod Z, where the pitman is attached thereto namely, at the pivot 7t-is offset downwardly, as at L, to-accommodate the location and operation of a pitman f, which terminates in a short fork g, straddling the said rod and pivoted to the said rod at It.

By the construction hereinbefore described it is obvious that power is transmitted to the crank s from the pitman f through the medium of the upper rod Z and the lever m and that the depending rock-arm p and the lower rod 0 are instrumental in guiding the upper ciprocating member (2 to any movable body' or object to which power is to be transmitted from the said reciprocating member.

What I claim is l. The combination, with a reciprocating member; means for actuating the said reciprocating member; means for guiding the said reciprocating member, and a movable body or object to which motion is to be transmitted from the said reciprocating member, of an oscillating lever operatively attached to the aforesaid movable objector body to "which motion is to be transmitted and arranged a suitable distance from the path of the aforesaid reciprocating member, which lever extends in opposite directions from the point of its attachment to the object to be actuated thereby; a rock-arm arranged between the lever and the said path; two approximately parallel rods establishing operative connec;

tion between the rock-arm and the lever,

which rods are arranged at opposite sides re-' spectively of the aforesaid point of attachment, and a pitman operatively attached, at one end, to one of the said rods in suitable proximity to the lever and operatively connected, at its other end, with the aforesaid reciprocating member.

2. The combination, with a reciprocating member; means for actuating the said reciprocating member, means forguiding the said reciprocating member, and the cranlrof a crank-shaft arranged asuitable distance from the path of the reciprocating member, of an oscillating lever operatively attached to and at the Wrist of the crank and extending above and below the said wrist; a depending rockarm arranged a suitable distance from the le-.

ver between the shaft-and the aforesaid path; two approximately parallel rods pivotally attached to the upper end and lower end respectively of the lever and operatively attached to the rock-arm at different elevations respectively, and a pitman operatively attached to the upper rod near the lever and operatively connected with the aforesaid reciprocating member.

3. The combination, with a reciprocating member; means for actuating the said reciprocating member; means for guiding the said reciprocating member, and a movable body or object to which motion is to be transmitted from the said reciprocating member, of an upright oscillating lever operatively attached, centrally between its ends, to the aforesaid object or body to which motion is to be transmitted, which lever is arranged a suitable distance-from the pathvof the aforesaid reciprocating member; a rock-arm arranged near the said path; two approximately parallel rods extending between and pivoted horizontally and transverselytothe lever and to the rock-arm, which rods are-arranged, at the points of their attachments'to the lever, equidistant from the wrist of the crank, and a pitman operatively attached, at"one end, to the upper rod and operatively connected, at its opposite end, to the aforesaidreciprocating member.

4. Power-transmitting mechanism comprising an oscillating lever operatively engaging a movablebody or object to which motion is to be transmitted, a rock-arm arranged asuitable distance from the lever, two approximatelyparallel rods extending between and pivoted horizontally and'transversely to the lever and to the rock-arm, and a suitably-actuated 'pitman operatively connected with one of the said rods, and the pitman-engaging rod being oEset-where the pitman is attached thereto toward the other rod, and the arrangement of the parts being-such that motion is transmitted to the lever from the'pitman through the medium of the rod to which the said pitman is attached and that the rockarm and the other'rod cooperate as a guide. In testimony whereof I sign the foregoing specification, in the presence of two witnesses, this 12th day of March, 1903, at Cleveland, Ohio.

-ISADO'R LEHMAN. Witnesses:

C. H. Donna, G. M. HAYES. 

